Need help creating link on writer's forum

I have just registered on this site and wish to make some writing contributions, but I don’t know enough about computers and creating links to be able to figure this one out. I’m the kind of guy who needs a tutorial for the tutorial.

http://www.helium.com/items/new?id=24356-poetry-remembering

Write to a title in 3 easy steps:
StepWrite article
tooltip icon
Article title: Poetry: Remembering

* Create a link: Highlight the word or words you wish to link. The “link” icon will show up on the toolbar. Click that to open the box where you can insert your link—remember to start your link with www.
* Remember to spell check!
* Word count: Use the “calculator” icon to give you a final word and character count.
* Preview: Use the magnifying-glass icon to show you what your final published piece will look like.
* Do not include your name. Your byline will appear below the article title and at the end of the text when it’s published.